664761250054 has 16 divisors (see below), whose sum is σ = 1125301176720. Its totient is φ = 291744748960.

The previous prime is 664761250007. The next prime is 664761250067. The reversal of 664761250054 is 450052167466.

664761250054 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a junction number, because it is equal to n+sod(n) for n = 664761249986 and 664761250013.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 520972129 + ... + 520973404.

It is an arithmetic number, because the mean of its divisors is an integer number (70331323545).

Almost surely, 2^664761250054 is an apocalyptic number.

664761250054 is a deficient number, since it is larger than the sum of its proper divisors (460539926666).

664761250054 is a wasteful number, since it uses less digits than its factorization.

664761250054 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1041945575.

The product of its (nonzero) digits is 1209600, while the sum is 46.

The spelling of 664761250054 in words is "six hundred sixty-four billion, seven hundred sixty-one million, two hundred fifty thousand, fifty-four".